Bricklayer&#39;s corner and lead plumb



E. C. LANDON. BR ICKLAYERS CORNER AND LEAD PLUM.

APPLICATION FILED MAR. 22, 192]- 1,410,481

Patented Mar. 21, 1922.

. a SHEETSSHE-ET I- E. C. LANDON. BRICKLAYERS CORNER AND LEAD PLUM.

APPLICATION FIL ED MAR. 22. 192].

Patented Mar. 21, 1922.

3 SHEETS-SHEET 2- E. c. LANDON.

BRICKLAYERS CORNER AND LEAD P'LU-M.

I APPLICATION FILED MAR. 22. 1921. 1,410,481

Patented Mar 21, 1922.

3 SHEETS-SHEET 3- EMMETT C. LANDON, OF MARION, OHIO.

BRICKLAYERS CORNER LEAD PLUMIB.

iaioasi.

Specification of Letters Patent.

Patented Mar. 21, 1922..

Application filed March 22, 1921. Serial No. 454,340.

ing implements or devices, and refers more v a novel device for use by like artisans 1n the erection particularly to bricklayers and of walls and similar structures.

An object'of this invention is to provide a device by use of which it is unnecessary to first build what are known as corners and leads. At the present time, in wall construction it is necessary to exercise all the skill and precaution possible in the building up of these corners and leads so that upon completion of the same, the wall may be filled in between them. the corners and leads serving-as supports and guides for plumb lines which determine the face of the wall and which must be consecutively raised for indicating the horizontal levels of the various'courses of brick.

Another object of this invention is to provide a measuring device of" this character which may be clamped upon the bricks of a course, and which rises above the same to take the place of corners and leads, which are now first constructed, the device having instrumentalities capable of various adjustments for carrying the plumb line, and for determining the proper stepping of the same during the laying of the various brick courses.

The invention has for a still further object the provision of a measuring device of this character by use of which one man is capable of doing the work practically of two men, and wherein the measurements and erections of walls is facilitated and expedited so that a great deal more work may be accomplished with a greater factor of accuracy than according to the present methods and means employed.

The invention further aims at the provision of a measuring device of this general character which may be applied to practically all wall constructions, and which is adjustable for adapting the device to inside and outside corners, to pilasters and other projections in wall construction, and to various other conditions or structures met with in the building of walls.

The above, and various other objects and advantages of this invention will be in part described in, and in part understood from, the following detailed description of the present preferred embodiment, the same being illustrated in the accompanying drawings, wherein: v

Fig. 1 is a side elevation of a bricklayers corner and lead plumb adjusted to a wall in the course of erection, the plumb being shofivn as applied to an exterior angle of the wa Fig. 2 is a somewhat similar view disclosng the device as applied to the fiat face of a wall;

Fig. 3 is a top plan View of the plumb adjusted in the position shown in Fig. 1;

. Fig. 4 is a vertical section taken through the wall substantially on the line li of Flg. 1, and showing the plumb applied to the wall;

Fig. 5 is a top plan view of the plumb applied to the inside angle of a wall;

Fig. 6 is a similar view of the plumb adjusted and applied to a pilaster in a wall structure;

Fig. 7 is a side elevation of one of the main clamps;

Fig. 8 is a transverse section through-the same taken substantially on the line 8-8 of Fig. 7;

Fig. 9 is a detail side elevation of one of the standards or uprights employed, together with the parts carried thereby;

Fig. 10 is a detail enlarged section taken through the same substantially on the line l0-10 of Fig. 9;

Fig. 11 is a fragmentary enlarged sectional View taken through a portion of the standard and the slide or plumb carrier thereon, the view showing the locking or latch lever in position for holding the slide when adjusted;

Fig. 12 is a plan View of a steadying or lower clamp, partly in section and as used at the bottom of Fig. 2;

Fig. 13 is a transverse section through the same taken substantially on the line 13-13 of Fig. 12;

Fig. 14 is a similar view of a substitute main clamp adapted for use in application to pilasters as shown in Fig. 6;

Fig. 15 is a detail perspective view of a plumb line gage and carrier adapted to be.

slide and' mounting therefor on the standard. 7

Referring to the drawings, wherein like parts are designated by similar numerals of reference throughout the several views, .25 and 26 designate a pair of standards or up rights which are of similar construction and which, as shown in Figs. 9 and 10, are each formed of a flat elongated strip of wood or the like having upon its lower end an edgewise reduced portion forming a shank 27 constituting a support for the upright, and which-is preferably reinforced at its edges by metallic strips 28. This strip or upright has reinforcing edge strips or rails 29 extending throughout the length. of

the upright, and the rails 29 project beyond the outer face of the upright andare curved inwardly toward each other to a sutlicient extent to provide undercut grooves or recesses and thus form a vertical guide'way at the outer face of the upright.

For the purpose of determining the perpendicular position of the upright 25, the same may be provided near its upper end with an opening 30 extending entirely through the body of the upright and mounted in the opening is a horizontal spirit level 3lrigitlly supported in the upright and which may be viewed from either side thereof for determining the correct position in which the upright or standard is supported.

A slide 32 is mounted against the outer face of the upright, and in the present in stance, is shown as comprising a pair of plates, the outer one of which comprises the body plate and is adapted to lap at its opposite edges over the exterior surfaces of the rails 29. The slide 32 carries a back plate 33 which is secured to the body plate by tongues 34 and 35 turned over rearwardly from the respective lower and upper edges of the body plate. and engaging over the adjacent edges of the back plate 33 to bind the plates together a unit.

The upper edge of the back plate 33 carries a rearwardly overturned flange 36 which is apertured to receive therethrough the overturned tongues 35 at the upper end of the body plate 32, the tongues 35 being shown as two in number in the present instance.. The tongue or flange 36 of the backplate is spaced therefrom and pivotally supports the upper end of a spring latch lever 37, Figs. 10 and 11, which is hinged to the versely against the rear side of the back plate 33. 1 V

The latch lever 37 projects below the slide a distance sulficient to permit the flexing outwardly of the lower end of the lever 37, and the lever 37 carries at its lower end, a locking pin 38, Fig. 11, which projects inwardly toward the upright 25, and'which may be opposite a handle 39 which projects outwardly from the lower end of the resilient locking lever 37. The plates 32 and 33 may be further secured together by bolts 40, having heads seated against the rear side of the back plate 33 and projecting outwardly through the plates and receiving thereon knurled thumb-nuts 41 adapted to bind the bolts 40 through the plates. The knurled thumb-nuts 41 may also be employed foradjustably and removably securtongue 36 and is adapted to swing transing a gage finger 42 for clamping the latter against the outer face of in Figs. 9 and 10.

The standard 25 has in its outer face a plurality of vertical grooves 43, 44 and 45, and each vertical groove has in the inner wall thereof, a series of suitably spacedapart sockets or depressions 46 within which is adapted to be seated the locking pin 38. The grooves 43, 44 and 45 are so arranged that the locking lever 37 may be swung at its lower end into register with a selective groove so that the locking pin 38 may be engaged in the desired socket 46 of the desired groove.

In the groove 43 the sockets 46 are spaced apart vertically equidistantly with the disthe slide, as shown tance between adjacent sockets equal to the 7 height of a brick course in a wall. The sockets 46 of the groove 44 are equidistantly spaced apart. according to a different standard course of brick in wall construction, and the sockets 46 of the groove 45 are still differently spaced apart equally throughout the groove according to a different standard of height of the brick course in the wall. It is of course understood that the vertical grooves may be in any desired number within practical limits, that the standards 25 may be of any practical height, and the sockets 46 may be arranged according to any determined standard for which the device is adapted for use.

In lieu of the gage linger or member 42, which is relatively short and provided in its edge with a notch 47 to receive the looped end [of a plumb line, the gage member 48, shown in Fig. 15, may be used. This gage member is adapted for such use as is shown in Fig. 6, and where it is desired to support the plumb line from a point spaced from and, angular-1y disposed with respect to the adjacent standard. The gage member 48 comprises a channeled body part in the form of a bar having a series of apertures 49 therein, through which one or'more bolts 40 may be engaged to hold the gage member 48 in the desired position.

On one end of the body part 48 is mounted an angle iron 50 secured by a bolt- 56 to the body part by passage of the bolt 56 through a selected aperture 49, the bolt 56 passing through one arm of the member 50. The member 50 has an inturned flange 51 which is bent inwardly and overlaps a corresponding flange 52 formed on the other arm of the angle arm 50. The flanges 51 and 52 are preferably bolted together by a bolt 53 for rigidlyholding the arms of the member 50 at right angles one to the other.

The inner arm of the member 50, or the arm which bears against the body portion 4.8. has an inturned flange 54 extending throughout the length of the arm to reinforce it. The body portion 48 also has an inturned flange 55 upon its edge remote from the flange 54 to reinforce the body member. The body member and the inner arm of the angle 50 are connected to-- gether by the bolt 56 which is adjustably positioned in the apertures 49 of the overlapping parts. i j V In this manner the gage member 48 may be extended to the desired length within the limits of the overlapping arms or parts. The body member 48 is bent at right angles at its end remote from the flange 52, as at 57, to serve as a support for an extension arm 58, Fig. 15, which is provided with a series of apertures arranged longitudinally therein, and through which are secured clamping bolts 59, the latter also engaging through the overturned portion 57 of the body strip of the gage. The outer end of the extending arm 58 is bent at right angles and has the notch 47 formed therein by means of which the plumb line may be attached to the extension arm. 7

A still further modified form of gage member is shown in Fig. 16, and wherein the same comprises a body strip 60 having a longitudinal rowof perforations 61 therein adapted to receive the bolts 40 therethrough for clamping the body strip 60 to the slide. One end of the gage member 60 is bent at right angles to provide an attaching finger 62 which has an aperture 63 therein to receive one of the bolts 40, and

which has a notch 64 in its free edge into which may be seated the adjacent bolt 40 for holding the finger 62 rigidly to the slide. This finger 62, together with the body strip 60, admits of the positioning of this gage member at difierent angles and positions upon the slide member for accommodating the device to various classes of work.

The standards 25 and 26 are supported in upright position by .a pair of main clamps 65 and 66, Fig. 2, which comprise body members in the form of flat bars provided at their upper and lower edges and at adjacent ends with hinge eyes 67, through which is removably secured a hinge pin 68 for hingedlyconnecting the clamps 65 and 66 together;, The clamps are provided at opposite sides of the pin 68 with a pair of sockets 69, through which the depending shaiks 27 of the uprights are adapted to exten The sockets 69 are so positioned that when the uprights are mounted thereon, the clamps 65 and 66 together with the uprights may be swung into different angles as a unit. The standards or uprights 25 and 26' are also hingedly connected together at one edge by pins 70, Fig. 3, which are removably secured in eyes 71 or 72, Fig.5, located at opposite edges of the standards so that the latter may be hingedly connected at either of their edges.

The sockets 69 are vertically offset with respect to each other, Fig. 2, to an extent sufficient to permit the swinging of the clamps 65 and 66 into a position at right angles to each other without interference, and the clamps are further provided with a second pair of sockets 73, Fig. 2, which are arranged at right angles to the sockets 69 and also in offset position to permit the insertion of the shanks 27 when arranged at right angles to each other.

Each clamp is provided at its lower edge, and near its outer end as shown in Fig. 8 with a jaw plate 74 bolted or otherwise permanently secured to the clamp 66 and having a forwardly projecting flange which extends acrossthe lower edge of the clamp and'has at its forward edge a row of upstanding teeth, 75 adapted to engage against the lower side of a course of brick. This jaw plate is preferably secured against the inner side of the clamp body and the forwardly projecting flange thereof is of slightly greater width than the. clamp body, so that the teeth 75 outstand from the outer face of the clamp.

A movable jaw plate 76, Fig. 8, is slidably disposed against the rear side of the fixed jaw plate 74 and has at its upper edge, a forwardly turned flange of greater width than the clamp body, and provided at its forward edge with downturned jaw teeth 77 arranged substantially opposite to the teeth 75, and

adapted to move toward and from the same upon thesliding of the movable jaw plate 76.

The flange of the movable jaw plate is apertured to receive therethrough a pair of upstanding guide pins 78, Fig. 8, which are carried by the clamp 66 forguiding the movable plate 76 in its opening and closing movements. The teeth 77 are normally urged in a downward direction by a spring 80 which is mounted upon a rod 79. The

spring 80 surrounds the rod, and the rod has-a head 81 upon its lower end against which the spring 80 seats.

The upper end of the spring bears against a fixed lug 82 which projects rearwardly from the lower edge of the clamp body 66, Fig. 8, so that the spring normally urges the rod 79 in a downward direction. The upper end -'of the rod 79 passes through an outturned lug 83 carried upon thev movable plate 76 and an adjustable stop collar 84 is mounted on the rod 79 above the lug 83 to move the latter downwardly with the rod under tension of the spring 80.

The clamp is opened by a latch lever 85 which is pivoted at one end upon a bolt 86 projecting from the rear face of the clamp 65, the latch lever extending from the bolt 86 across the rear face of the sliding plate 76, and beneath a bearing block 87 which pro jects from the rear face of the sliding plate. The outer end of the latch lever 85 is offset rearwardly t'o outstand from the clamp 65 and is preferablyoverturned to provide a loop '88 through which may be secured a pull cord 89; for use in lifting the latch lever 85 to open the clamp. The pull cords 89 of the two clamps are preferably connected together and extend upwardly along the standards 25 and 26 to-the desired height from which the clamps may be easily opened. The standards or uprights are braced upon the clamps in anysuitable manner, such as by brace bars 90 pivotally secured at their upper ends upon the edges of the uprights 25 and26, and which are carried downwardly to the outer ends of the clamps 65 and 66 and suitably secured thereto by clamping bolts 91, which engage in slots 92 formed longitudinally in the lower ends of thebrace bars 90. The bolts 91 are preferably carried upon the outer ends-of brackets 93 which project from the rearv sides of the clamps 65 and 66, for maintaining the braces 90 in line with the edges of the uprights to which the braces are pivoted.

- As shown particularly in Fig. 2, the stand ards or uprights may be further braced upon the wall by a reinforcingor auxiliary clamp 94." This clamp' 941- is substantially of the same construction as that of the clamps '65 and 66 with the exception that this auxiliaryclamp is provided'with acoupling 7 plate 95'supported upon arms96 which rise from the rear face of the clamp 94 to a suitable height.

- The arms 96, as shown in Figs. 12 and 13,

are overturned at their lower ends to pro vide boxes 97 and in which are placed wing nuts 98, which engage threaded bolts 99 which pass through the boxes 97 and project from the rear face of the clamp 9st. For adjusting the nuts 98, the arms 96, together with their coupling plate 95, may be moved toward and from the wall to aline the coupling plate withthe lower ends of the shanks 27. The coupling plate 95 is'provided intermediate its ends with an elongated slot 100 of suflicient size to snugly receive therein the lower ends of theshanks when brought together in the position shown in Fig. 2.

One of the pull cords 89 may be provided with an extension 101 which is secured to the latch lever 85 of the lower clamp so that all three of the clamps may be equally and simultaneously opened.

A modified form of main clamp is shown in Fig. ll, the same being essentially of the same construction as is the "clamping members 65 and 66, with the exception that the body portion102 of this form of clamping member is relatively short and is provided at opposite ends with pairs of hinge eyes 103 and 101. These eyes 103 and 104 are adapted to receive therethrough the hinge pin 68 when the clamping member 102 is substituted for either one of the main clamps 65 or 66.

The clamp 102, Fig. 14:, is provided opposite ends with sockets'105 and 106 adapted to be used with the respective sockets 69 according to the position and adjustment of the clamping member 102.

In Fig. 2 the device is shown as applied to a flat wall, and it will be seen that the standards 25 and 26 are supported upon the main'clamps 65 and 66 with the clamps engaging over" the outer edges of the bricks in the top course and with the uprights rising above the present top of the wall. The auxiliary clamp 94 is also shown as at tached to the lower ends of the shanks 27 and as clamping a lower course'of brick for steadying the uprights.

The slides 32 are shown near the lower ends of the uprights and has supporting plumb lines 106 and 107 which extend in opposite directions from the standards. The structure thus takes the place of the lead which is usually formed by building up a single portion of the wall with great care. The plumb lines 106 and 107 are supported on the slides and the latter are held in proper position which is determined by en gagement of the locking pin 38 in the socket 46 of the selected groove.

Thus the plumb lines 106 and'107 are accurately positioned as to height above the top course of the wall and are adapted to determine the top of the next course as the latter is laid. As the work progresses, the slides 32 are raised upon the standards by springing out the latch lever 37 and moving the slide upwardly with the bolt 38 sliding in the groove. As soon as the bolt 38 reaches the next socket 46 it will snap into the same and thus determine and hold the slide in the next properly adjusted position.

As soon as the courses are laid to the height of the top of the standard, the workmen may draw the cord 89: and open all of the clamps simultaneously to free the device from the wall. The device is then merely lifted up and brought into proper line with the newly laid upper courses of the wall, the cord 89 being heldtaut to maintain the clamps open, and after prop erly'adjusted against the bricks, the cord 89 may be released so as to permit the clamps to close and thus secure the device in its newly adjusted position.

Fig. 1 shows a slightly different arrangement of this device as applied to the eX- terior corner of'a wall. In this case one clamp engages one-side and the other clamp 66 engages the opposite side, the uprights 25 and 26 swinging with the clamps and being held therebyat right angles to each other. In this case the auxiliary clamp 94: need not be used because the uprights and main clamps being arranged at right angles to each other are interbraced- If desired, a pair of these devices may be used and employed such as suggested in Figs. 1. and 2, wherein one oi the devices is located at the corner of the wall and the other device at a distance therefrom, so as to hold and adjust the plumb line 10'? be tween the devices.

. When it is desired toplace the device at the inside angle of 'a wall, as shown in Fig. 5, itis only necessary to change the hinge pins 70 to the other edges of the standards 25 and 26 and to place the shanks 27 of the standards in the outer sockets T3 for supporting the standards at right angles to each other, and with their outer faces directed toward the opposite sides or the cor- Del.

In other respects, the application and use of the device is similar to'thatabove described. Y

When it is desired to use the device on projections, pilasters and the like in wall construction, such as shown in Fig. 6, the short clamp 102 is substituted-for one oi": the main clamps, such as the clamp 66in order to accommodate the device to the relatively shallow surface at the side of the wall projection; The substitution is effected by merely ,removing'the hinge pin 68 to -.separate the clamps 65 and 66-and to then substitute the modified form of clamp 102,

placing the pin 68 again in position.

'A modification of the slide is shown in Fig. '18, wherein thesame comprises a body plate 32 having outturned lugs '83? near opposite ends for sliding engagement behind the rails or flanges 29 of thestandard .25.

In this case, the lugs are welded or otherwise suitably secured to the plate 32 and the back plate 83 is done away with.

' .From the above description'and the'examples of use of the device, it is apparent that the parts may be adjusted and substituted one for the other to adapt the device to flat walls, innerandbuter corners, jections, pilasters, and numerous other ditions met with in wall structure and wherein heretoforegreat time has been con-' snmed and considerable care and experience necessary in the formation of corners and leads, which are usually relied upon in building walls. i

It is of course understood that various changes and modifications may be made'in the details of'construction and design of the above specifically described parts of this invention without departing from the spirit thereof, such changes and modifications being restricted only by the scope of the following claims.

IVhat is claimed is l. A brick layers corner and lead plumb comprising a pair of uprights hingedly connected together edge to edge, means for sup porting said uprights from their lower ends and engageable with courses of brick in a wall, and adjustable means carried upon the uprights for supporting a plumb line for plumbing the wall.

2. In a bricklayers corner and lead plumb, a pair of uprights hingedly connected together edge to edge, apair of clamps hingedly connected together, means on the clamps for receiving said uprights and the uprights and clamps being adapted to be swung one upon the other into various anguiar positions for engagementagainst a wall, said. clamps being adapted to grip the brick courses of a wall for holding said uprights in raised position to extend above the top of the wall, and plumb line carriers adjustably proconmounted on the uprights for advancing the a plumb'line, and means on the uprights co operating with said sliding means for determining the relative advancement of the sliding: means proportionately to the height of the brick courses in thewall construction. 4. In a 'brick layers corner and lead plumb, apair of uprights adjustably connected'together edge to edge, clamps for engaging the courses of brick in a wall .for

supporting said uprights, slides mounted on said uprights, means for lockmg the slides in vertically stepped positions, said slides being adapted: to carry a plumb line for determining the face otthe wall *and the height of the brick courses,'and means on said uprights for determining the advancement of said slides according to the desired thickness of the brickcourses.

5. In a brick 'layers corner and lead plumb, a pair of standards adjustably connected together edge toedge for fitting into angles of a wall, adjustably connected clamps for said standards adapted to engage the edges of brick in the courses of the wall for supporting the standards in upright position, slides mounted on the standards, means for securing the slides in various vertically adjusted positions foridetermining the height of brick courses as the building as the wall proceeds, and gages carried by said slides adapted for adjustment thereon for supporting a plumb line in definite relationto the outer face ofithe wall irrespective of various angular adjustments of said clamps and-uprights.

6. "In a brick layers corner and lead plumb, a pair of uprights hingedly connect-ed together edge to edge a pair of hingedly connected clamps adapted to support saiduprights and swing therewith into various relative positions, said clamps being adapted to engage the edges of bricks in the courses of the wall construction to support said uprights in raised pOSltlOn above the top of the wall, slides mounted on the uprights adapted to be stepped upwardly as the buildingofthe wall proceeds,

and interchangeable and adjustable gage pieces mounted on the slides adapted for adjustment and application according to the angular positions of said uprights on the wall to maintain a plumb line in proper position relative to the general face ofthe-wall.

7 In a brick layers corner and lead plumb, a pair of standards, means on the lower ends of the standards for clamping the same to the top course of brick of awall under construction, a plumb line carrier mounted on the uprights adapted to be advanced upwardly thereon in predetermined stepped relation for measuring the heights of brick courses during wall construction, andimeans for manually releasing said uprights from the wall upon the completion of the wall to the'height of the uprights whereby said plumb may *be continuously stepped upwardly upon the wall as the building. of the latter progresses.

In a brick .layers corner and lead plumb, .a pair of uprights, means carried upon the lower ends of the uprights :for grippingthe outer edges of'a course of brick atithe topof the wall, plumb line supporting means vertically movable upon saidupr ghts and adapted tobe stepped consecu- -tively upward with thelaying of-the courses -'-of brick, -manual means for releasing said clamplng means from the edges of :thebrick and adapted to -be operated for holdingthe clamping means in (position ifor engaging a lnglier course a: of brick duringithe advancement 20f (the iwall vconstruction.

9. In a brick :layerfs corner and. lead plumb, a standard, means for detachably supporting the standard upon the top of a wall, plumb line carrying means adjustably mounted on the standard and adapted toibe consecutively stepped upwardly thereon for determining the consecutive courses of brick during the wall construction, and manual means for quickly detaching said standard from the wall as the building of the latter proceeds whereby the plumb may be consecutively raised during the construction oi the wall to take the place of corners and leads for supporting the plumbline.

10. AIbIiCk layers corner and lead plumb having a standard, a clamp removably fitted upon the lower end of the standard and having upper and lower jaws vnormally urged toward each'other into closed position and adapted toengage over theouter edge of a course of brick, manual means connected to the clamp and to said jaws adapted to be operated for releasing said jaws from the brick and maintaining the jaws in spread position for engagement with a second courseo't brick, and a plumb line carrier mounted on .the standard for vertical ad-' justment thereon :to step up the plumb line during the'laying of the courses. ofbrick,

11. In a brick layers corner rand' lead plumb, means for supporting the lower end of the standard upon the top of a wall with the standard rising above the wall to take the place of a corner and lead, a slide mount ed for vertical movement on the standard, a lockinglatch carried bythe slide, and graduated sockets arranged indiflerently spaced groups upon-the standard for selectively.receiving said locking latch therein whereby said slide may successively [progress upwardly upon the standard according to brick courses of dilferent heights. j

12. In a brick layers corner'and lead plumb, a ;-pair of standards,-a pluralityof clamps connected to the lower ,ends ,of ,the standards adapted to .engage theicourses of brick near the top of the wall for supporting said standardsv in upright vp sitionvabove v the wall, plumb line carrying means on the standards adapted for adjustment thereonto measure the brick courses asthe Walloonstructionproceeds, and a single manually operated -means connected to vall pf-said clamps :for simultaneously ;I6l6LS111g the same from-the brick, courses of the wall and and for-maintaining-said clampsgin position for application 1nbr1ck-coursesata higher elevation-in the wall, ',whereby said plumb 7 may belsteppediupwardly uponithe wall ;as

the erectionof thesame proceeds.

'13. In a brick layers .corner and lead plumb, a pair of hingedly connected standards, a pair of 'hingedly connected clamps each having a socket adapted to receive-the lower end of vone of the standards, .a third qlem ar anged belew said pair at clamp and adapted to receive the lower ends of said standards for holding the same in adjusted position, all of said clamps being adapted to engage in the outer edges oi bricks of diiierent courses in a Wall construction whereby to rigidly maintain the standards in upright position above the Wall, braces carried by the standards and adjustably connected to said pair of clamps for determining the positions of the standards on the clamps, and a single manually releasable means connected to all of said clamps for equally and simultaneously opening the same to release the plumb from the Wall, said clamps being normally urged to close whereby to grip the outer edges of bricks in the courses of the 7 Wall when said manually releasable means is released.

14:. A brick layers corner and lead plumb comprising a pair of uprights, means for interchangeably hinging said uprights together at their opposite edges, a plurality of clamps, means for interchangeably and hingedly connecting said clamps together,

sockets on the clamps adapted to engage said standards for holding the same in upright position, and means for manipulating said clamps for applying the same to the exposed edges of brick in a Wall course and for re moving the clamps therefrom.

15. In a brick layers corner and lead plumb a pair of standards, clamps mounted upon the standards, means for hingedly and adjustably connecting thestandards and the clamps together for accommodating the device to Wall structures, slides mounted on the standards adapted to support plumb lines, and means for holding the slides in vertically adjusted positions upon the standards and for determining said positions to indicate proper heights of courses in wall construction.

16. In a brick layers corner and lead plumb, a standard, means for supporting the standard on the top of a Wall, a slide on the standard, parallel grooves formed in the standard and extending vertically therein, retaining means carried by the slide and being adjustable therein for engagement in a selected groove for traveling in the groove during adjustment of the slide, and means differently graduated in the grooves for cooperation With said retaining means for de termining the advancement of the slide on the standard and for holding the slide in adjusted position to support a plumb line.

EMjMETT O. LANDON. 

